console.log(typeof 10) //number
console.log(typeof(2===3))//boolean
console.log(typeof .1)//number
console.log(typeof '10') //string
console.log(typeof false) //boolean
console.log(typeof NaN) //number

//object
console.log(typeof new Date())
console.log(typeof {})
console.log(typeof [])
console.log(typeof null)

//undefined
console.log(typeof undefined)

//number string boolean null undefined object
